n max 0 _ 3 _ 6 6
0 6 3 6 -> iterate backwards until you find it -> 3 3 6 -> 1 1 6 -> 0 0 6 -> etc. 4 6 0 6 2 6 0 6 2 6 2 6 1 6 8 8
0 8 5 8 0 8 2 8 6 8 18 18
0 4 15 0 3 21 0 3 3 1 17 0 5 17 3 6 17 3 3 1 10 0 10 2 26 0 4 25 0 3 11 0 3 3 1 15 33 0 6 23 0 3 8 49 0 4 19 0 3 7 0 3 3 1 19 8 13 0 7 9 0 3 9 3 2 41 0 6 29 0 3 7 13 16 0 5 63 0